Chapter 2. How Lenses Work
A lens can be made from a single piece of curved plastic or a complex system of crystal–clear disks of polished glass. When you pay a lot for a camera, film or digital, a big reason behind the price tag is the lens. A good lens delivers an image as sharp as an eagle’s eyesight and is free of the distortions in color and shape that come with cheaper lenses.
The lens is the most important part of a camera. The image created on a sensor or film is only as good as the image created by light that the lens must focus. The use of glass or plastic, how many pieces of plastic or glass elements make up the lens, and the precision ...
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